51472-63-0Relevant articles and documents
The catalytic ring-opening cyclooligoraerization (ROC) of by the complexes M(CO)5L (M = Cr and W; L = CO, and 1,5,9-trithiacyclododecane)
Adams, Richard D.,Falloon, Stephen B.,Perrin, Joseph L.,Qoeisser, Joachim A.,Yamamoto, John H.
, p. 313 - 318 (1996)
The following four compounds have been synthesized: M(CO)5L (3 and 4, where M= Cr and W, and L = SCH2CH2CH2), W(CO)5(12S3) (5, where 12S3 = 1,5,9-trithiacyclododecane), and [W(CO)5]2(12S3) (6). The molecular structures of 4 and 5 were established by single-crystal X-ray diffraction analyses. Both compounds contain a W(CO)5 group coordinated to one of the sulfur atoms of the heterocycle. The ability of the compounds M(CO)6, 1 and 2 (M= Cr and W), and 3-5 to catalytically produce ring opening cyclooligomerization JROC) of thietane into 12S3 and 24S6, (2486= 1,5,9,13,17,21-hexathiacyclotetracosane) has been investigated. Compounds 1-3 have relatively low activity. Compounds 4 and 5 have the highest activity and selectivity for 12S3 formation. Crystal Data for 4: space group = P212121, a = 12.906(2) A, b = 13.730(4) A, c = 6.427(1) A, Z = 4, 1306 reflections, R - 0.033; for 5: space group = P1, a = 12.703(1) A, b = 13.510(2) A, c = 5.833(1) A, α = 101.75(1)°, β = 97.54(1)°, γ = 101.70(1)°, Z = 2, 2225 reflections, R = 0.023. VCH Verlagsgesellschaft mbH. 1996.
Catalytic cyclooligomerization of thietane by trirhenium cluster complexes. A new route to polythiaether macrocycles
Adams,Falloon
, p. 10540 - 10547 (2007/10/02)
In this report, the results of our studies of the title reaction are described. It is demonstrated that these thiaethers also produce ring opening of the bridging thietane ligand, but in the case of thietane a series of ring-opening coupling reactions occurs that is concluded by cyclization processes that yield polythiaether macrocycles. Indeed, the ring-opening cyclization can be performed catalytically under suitable conditions to yield the macrocycles in a free state in substantial amounts.
